Metal treating composition



Patented Jar 1 3, 19 p strength sites.

U ITE YST i 1 DAVID LAMON, orprawns, CQLOB-AIDQM METAL ritnarmqcomrosrrrou No Drawing.

My present invention relates to an improved metal treating composition of the molybdic class, for hardening and strengthening such metals as iron, steel, copperand their alloys.

The different metals and their alloys may be treated with my composition for enhancmg their commerclal value, widenmg their scope of usefulness, and increasing their physical properties, Without in any way im- Brass and copper may also be treated by my improved composition, and after the copper has been treated accordingto my invention, the metal has imparted thereto a considerable degree of elasticity, and its tensile strength is enhanced, without materially impairing or lowering its ductility. Such treated metal is especially advantageous for .use instrips and wires, such as are employed as electrical conductors, and for electric resistance devices. L r

The improved composition is comprised of the following ingredients :boric acid, cyanide of potassium' and molybdenum in proper portions, and the composition is varied asto -quantitygiused according to different existing conditions. v I A From the molybdenum, which is obtained in crystalline crusts,-molybdates or salts are derived, and acid molybdic is also derived.

Application filed liarch 1,""1s30;" Serial na'rsaseij" F or general use, thefollowing-formula .may-be followed: @l. is;

. (J1, "I .Part

Cyanide of potassium"; m iigeg er '2 Boric' acid 14 Acid-moly-bdic 50-to 85-per'cent) Q l Insome instances, to thefpreceding fon mul a' is added the use of acid molybdicfan- "hydride 100%, onelhalf of apart. p I.

' Another formula contains i 0 fftarts Borlc acid 1 Potassium cyanide 2 Acidlmolybdic (50% to 85%) C P 4:

Acidmolybdenum anhydride (100% .31.73

In preparing them for use the ingredients are thoroughly pulverized and mixed to form the compound or composition, ready for use.

In the treatment of the metal with the;-i composition, the steps of the following process are carried out. The metal or alloy to be treated (or the metal in a manufactured form) is heated in a furnace, either of intermittent or continuous operatiomand by im- 170.-

p pingementof a non-luminous flame, is brought to a semi-molten state, after which the surface of the heated metal is sprinkled or covered with. the composition or compound. I The proportions of the ingredients of the compound may vary, and the degree of temperature to which the treated metal is subjected may also vary in accordance with the nature of the metal. In the treatment of copper, the approximate temperature may be 600 degrees F.; for brass 700 to 1000 degrees F.; and for iron or steel, the temperature may vary between approximately 1200 to 1900 degrees F. The temperature is maintained for a suitable period of time during which the chemical action of the composition on the treated metal hardens, ,toughens, and strengthens the metal to a desired degree, without the necessity for use of an alloy.

The processed metal is then cleaned and allower to gradually cool.

In some instances the processed molten metal is passed through a water solution of citric acid, with a salt of copper, such as a sulphate.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. An improved composition'for the treatment of metal comprising: P

. arts Cyanide of potassium 2 Boric acid 1 Acid molybdic 1 2. An improved composition for the treat ment of metals comprising:

Parts Cyanide of potassium 2 Boric acid 1 Acid molybdic 1 7 Acid molybdic anhydride a 3. An improved composition for the treatment of metals comprising:

Parts Boric acid 1 Potassium cyanide 2 Acidmolybdic (50% to C P 4 Acid molybdenum anhydride 1 In testimony whereof I have affixed my signature.

, DAVID LAMON. 

